When we typically speak of recovering data, we usually mean getting data back that was previously deleted--since Windows does not actually delete files, but deletes addresses to where files are located (gross simplification), you can recover deleted files
These files you're referring to were actually never correctly saved to the disk, and the liklihood of recovery is far lower.
That said, there are a few programs that may help you outhttp://www.softwarep...d-recovery.html
Try the above first....if possible, install on a different machine and try recovering the dvd files from there. Then move them over.
In the meantime, do not use the newly installed machine as this decreases the liklihood of recovering anything from the current drive
(btw--did you format, repair, or delete the partition on this PC)